Lawn mower



`0Ct- 6, 1931- H. M. HEssENBRUcH 1,826,663

LAWN MOWER Filed May 22, 1930 2 Sheets-Sheet l Wl TNESSES I N VEN TOR:

oct. 6, 1.931- H. M. HEssENBRUcl-l 1,826,663

LAWN MOWER Filed May 22, 1930 2 Sheets-Sheet 2 Patented 6, 1931 l UNITi-:ofsTArEs PATENT OFFICE HERMANN n. nEss'ENBnUcH, or wYNNEWOOnPENNsYLvANIA, AssIGNOR TO'PHILA- nnLPn-IALAWN MOWER COMPANY INC., OP PHILADELPHIA, PENNSYLVANIA, A

CORPORATION OF PENNSYLVANIA Y Application'fled Hay 22,

This invention'relates to lawn mowers andy more particularly tothe type' including symmetrical side plates :connected together 1n parallel relation bymeans of a shrub bar '5 or girth made'from a solidpiece of material,

` said bar or girth having provislons whereby the side plates are secured thereto. lAn. ob-

jection to such manner of securing the slde plates together is that, unlessgreat care is exercised, it is almost impossible to securesaid plates in true alignment; thereby. causing trouble in fitting and assemblingjthe associ- 'y ated mechanism. if.

. The primary object =of. tl1is invention is to 15 provide a lawn mowerl in which the `side platesl embody novell features whereby accuracy in assembly and correct alignment of the respective parts ispositively ensured.

Another object is to lprovide an improved form of side plate for lawn mowers embodyingnovelffeatures whichrfacilitate expeditious removal of thev rotary cutter for renewal, or-other purposes, without separating the side plates; novel means. affording guidv ance for the back roller supporting elements;

and 4integral abutment loops for steadying the stationary` knife adjuster screws. c

A further objectv is: to provide -a lawn mower frame construction including novel 3o means for connection of the handle brace.

Withy thestated objects in view, together with others whichv 'will appear vas this description proceeds, myinvention .residesin the novel forination, combinationand ar- 35 rangementof parts,;all as will be described more fully hereinafter shown bythe accompanying drawings, an particularly specified intheclaims. 4. y r

In they drawings:` 'i Fig. I yis atop plan lview lawn mowerwith parts insectionbetter to disclose certain ,of the novel features.`

Fig. II is a transverse sectional view of the same;an d, 1

Fig. III is a k,perspective view'lookingtoward the-inner face of one the sideplates.`

Referring. more in ydetail to the several illustrations, thefgframe of my improved lawn mowery comprises counterpart` ,sided 5 Plates, emp-hmsively .designated 1.5 each of myimproved" f LAWN MOWEB 1930.l Serial No. 454,635.

of which, as best appreciated from Fig.

ing or indentation 2 setting apart the circular portion, and a surrounding flange or li f.' During the course of fabrication each si e plate 1 is suitably pierced, as by punching or otherwise, to provide a series of holes14, 5

and 6, for purposes later on explained; as well as a concentric apertured embossment 7,

and an eccentric embossnient 8; the former of.

which 7 constitutes a bearing for one of the ground wheels 9, while the latter 8 aiords vay housing for a bearing l() for one end ofthe rotary cutter shaft l Each side plate 1 is also provided with a pair of laterally-directed integral abutment loopsk 12 conveniently expanded out therefrom; while the terminal end of the portion 3 is notched at 13 to constitute guide means,

in conjunction with the vertical flanged edge f" and a paralleling segmental offset 3', for the slotted supporting element 14 and back rollerl.

In addition to the foregoing, I punch an angular hole ororiiice 16, square for example,

rthrough each side plate 1, and expand edges lthereof in the forniv of yparalleling flanges or lugs 17. Fitting over these flanges or lugs 17 is a length of square-section tubing 18 which constitutes the girth or brace bar between the opposing side plates 1, said plates being secured together through the medium vofa tie rod 19 having screw-threaded ends for reception of clamp nuts 20. In this manner, it will be apparent, it becomes absolutely impossible for anyone, whether skilled or not, to secure ythe opposing side plates l together wthout'having them in true alignment.

Referring to the concentrick apertured embossment 7, I fit thereinto a piece ofround tubing 21, and hold the same in place by means of a bolt 22 having a lock Washer and Y nut 23 said tubing serving as a bearing sleeve for the ground wheel 9. v The advantagel of ysuch a construction is that provision is made whereby the easy removal vof the wheel bearing sleeves 21 can be readily eii'ected and replacements made when said bearlngs become worn.

Secured to each side plate 1, as by welding or otherwise, is a stamping 24 having an out` standing tongue or lug 25 with Aa latching notch 26; said stamping bemg properly .centered and retainedv against rotation relative to the side plate 1, during process of lixture thereto, by inserting a pin or the like through the hole 4, hereinbefore referred to, into a corresponding hole in the stamping 24, in an Obvious manner. The tongueor lug 25 with its latching notch 26 jointly afford connection for the handle braces 27, when .secured to the handle h b Lbolts 27', one only being shown, all of W ich will be readily understood by those acquainted with the art. This manner ofconnectin the handle braces 27 to the side plates 1, a ords a simple and effective means of attachment, while at the same time it is of a character not liable to work-loose; or, the latching tongue 25 to become fractured or be broken off.

Referring now to the rotary cutter or reel 28, it will be seen that the spiders 29 thereof are securely mounted on a tube 30 fitted on the hereinbefore referred to cutter shaft 11,

said parts being connected together by one or more set screws 31 threadedly engaged through one or both of the bosses of the spiders 29. Now, it will be readily apparent that by loosening or backing up the set screw or screws 31, the shaft 11 can be easily withdrawn and a fresh cutter or reel 28 applied to the mower without disconnection ofthe side plates 1.

The holes 5 afford pivot bearing for the stationary knife 32; the holes 6 for passage of the squared shank ends beneath the heads of the clamp bolts 33 that secure the back roller supporting elements 14 in position; while the lateral abutment loops 12 accommodate the stationary knife ad] uster screws 34; all in the known way. From the foregoing it is thou ht my invention will be readily understoo while the economical aspects thereof are obviously apparent; hence I reserve the right to such detail changes as may be warranted in view of prior 'art and the scope/'of the following claims permits.

Having thus described my invention, what I claim is 1. In a lawn mower, a pair of comple mental side members each embodying an angular aperture with a lateral lug, an angular section element co-'active with the lugs to align the side members, and means securing said members and element together. e

2. In a lawn mower, a pair of counterpart' frame com onent's, and means securing said parts rigidliy together.

3. In a lawn mower, a pair of counterpart side plates each embodying a square aperture with parallel lateral lugs, a square section tube engaging at its ends over such lugs to alignedly brace the side plates, and a tie rod concentric of the brace tube with means for securing said parts rigidly to ether.

4. In a lawn mower, a pair o counterpart side lates each enibodymg an aperture of angu ar contour with parallel lateral lugs and a cupped embossment, an angular-section tube co-operative with the lateral lugs to correctl align the side plates, means clamping t e side platesI and tube rigidly together, a bearing sleeve seating in each cupped embossment for a ground wheel, and means securing said sleeves to the side yplates while affording rotative guidance for the ground wheels.

5. In a lawn mower, a pairof counterpart side plates each embodyin an angular aperture with parallel lateral ugs and a plurality of cupped apertured embossments, an angular-section, tubular brace cofacting with the lateral lugs to correctly ali plates, al tie rod through thev tular brace rigidly clamping the side plates and brace together, bearing sleeves in aligned cu ped embossments 'for the ground wheels, securely clamping said sleeves in position While affording rotative guidance for `the ground'wheels, a rotary cutter shaft, bearings in the other opposing cupped embossments for said rotary cutter shaft, and means whereby the cutter shaft ma be withdrawn without separating the sideplates aforesaid.

6. In a lawn mower, a pair of counterpart side plates each embodying a rectangular aperture with lateral lugs and a plurality of culpped apertured embossments, a rectangu ar-section tubular brace co-acting with the lateral lugs to correctly align the side plates, a tie rod through the vtubular brace rigidly clamping the side plates and the side olts brace together, bearing sleeves in opposing bossments for said rotary cutter shaft, a coaxial tube, and means attaching said tube -to the cutter shaft whereby the latter may be withdrawn without separating the sidel plates. A

7. In a lawn mower, counterpart side plates each embodying a rectangular aperture having opposed lateral lugs and a pair of differently Acupped apertured embossments, a rectangular-section tubular brace co-acting with the lateral Iugs to correctly l align the side plates, a tie rod throughthe brace to rigidly clamp the latter and the -side plates together, bearing sleeves inopposing cuppe embossments for support of the ground wheels, bolts securing said sleeves in position, lateral latch elements on the side plates for connection of the mower handle braces, a rotary cutter shaft, bearings in the other opposing cup d embossments for the rotary 4cutter sha a co-axial tube itting the cutter shaft, and means attaching saidtube and shaft to ether with capacity for withdrawal of the atter when renewal of the cutter is necessary without disconnecting the side plates aforesaid.

In testimony whereof, I have hereunto signed my name at Philadelphia, Pennsylvania, this 15th dagiof Ma 1930.

HERMANN HEgSENBRUCH. 

